#!/bin/bash

# Copyright (C) 2018 VMware Inc.
# Author: Alexey Makhalov <amakhalov@vmware.com>
#
# Expand screen terminal to the full screen mode.
# Known side effect: screen might be "garbaged" by reply string.

full_screen () {
  if [[ -t 0 ]] && [[ -t 1 ]]; then
    # s - save cursor position
    # [r;cH - set cursor position to r;c
    # [6n - get cursor position
    # u - restore cursor position
    #
    # reply from terminal: [r;cR
    echo -ne '\es\e[999;999H\e[6n\eu'
    read -sd '['
    read -sd ';' rows
    read -sd 'R' cols
    if [[ "$( stty size )" != "${rows} ${cols}" ]] ; then
      stty rows ${rows} cols ${cols}
    fi
  fi
}

case $( tty ) in
  /dev/ttyS*|/dev/ttyUSB*|/dev/ttyAMA*|/dev/ttyXRUSB*)
    export TERM=screen
    full_screen
    ;;
esac
